February 14, 2015 - Dimitrios Kambouris/Getty Images North America more pics like this »
1. Gigi Hadid

Who: Gigi Hadid
What: Supermodel 
Why she's an 'It' girl: Making her Victoria's Secret Fashion Show Angel debut last year, Gigi comes from a family of models; her mom, Yolanda Foster is an ex-model and Real Housewife of Beverly Hills star, and her sister and brother, Bella and Anwar, are both rocking the runway as well. The only thing more A-list than the Hadids is Gigi's list of famous ex-boyfriends, including Cody Simpson, Joe Jonas and on-again, off-again beau, Zayn Malik.